Engineering Questions with Answers - Multiple Choice Questions

# MCQs on Important Cases of Potential Flow

1 - Question

The characteristic of Ideal fluid are
a) Incompressible
b) Inviscid
c) Fluid velocity is uniform
d) Shear stress has a constant, non zero value

c
Explanation: As ideal fluid is inviscid, shear stress is zero.

2 - Question

Which of the following is not a case of ideal fluid flow?
a) Forced vortex Flow
b) Uniform Flow
c) Sink Flow
d) Superimposed flow

a
Explanation: Forced vortex Flow does not satisfy the characteristic of ideal fluid flow.

3 - Question

What is a special characteristic of uniform flow parallel to X axis?
a) Velocity is constant
b) Acceleration is constant
c) X- component of velocity is constant
d) None of the mentioned

a
Explanation: Velocity is constant in uniform flow.

4 - Question

The source flow is flow coming from a point and moving out in a circular manner.
a) True
b) False

a
Explanation: The source flow is flow coming from a point and moving out in a radial manner.

5 - Question

The sink flow is flow in which fluid moves radially inwards towards a point where it disappears at a variable rate.
a) True
b) False

b
Explanation: The sink flow is flow in which fluid moves radially inwards towards a point where it disappears at a constant rate.

6 - Question

The pattern for streamlines and equipotential lines is different for source and sink flow.
a) True
b) False

b
Explanation: The pattern for streamlines and equipotential lines is different for source and sink flow

7 - Question

In free vortex flow, the flow is linear in nature.
a) True
b) False

b
Explanation: In free vortex flow, the flow is circular in nature.

8 - Question

What is the nature of streamlines of free vortex flow?
a) Concentric
b) Non-concentric
c) Linear
d) None of the mentioned

a
Explanation: The nature of streamlines of free vortex flow is concentric.

9 - Question

For source flow, the radial velocity increases as we move radially outward.
a) True
b) False

b
Explanation: There is an inverse relation between velocity and radial distance for source flow.

10 - Question

When is air assumed to be incompressible?
a) At low speed
b) At high speed
c) Independent of its speed
d) None of the mentioned